Drinking tea can keep you healthy, but drinking in the wrong way or tea will bring some side effects. Side effects of drinking tea on health, stones Some office workers like to soak a cup of strong tea during overtime to relieve fatigue and help health, but this is not correct, especially when drinking tea on an empty stomach during overtime, the human body will inhale a lot of oxalic acid, and then form stones in the body, which is also one of the side effects.